Question

What is the value of s in the equation 3 r equals 10 plus 5 s, when r equals 10?

4
8
100
200

Answer 1

The equation is 3r = 10 + 5s
we’re looking for the value of s when r = 10
3(10) = 10 + 5s
30 = 10 + 5s
-10 -10
20 = 5s
4=s
S = 4 when R = 10

Answer 2

Hey there!

“3r = 10 + 5s”

“r = 10”

3(10) = 10 + 5s

3(10) = 30

30 = 10 + 5s

“30 = 10 + 5s”

• FIRST: REVERSE/FLIP the EQUATION

5s + 10 = 30

• SECOND: SUBTRACT by 10 on BOTH SIDES

5s + 10 – 10 = 30 – 10

CANCEL: 10 – 10 because It gives you 0

KEEP: 30 – 10 because that helps us solve for our “s-value”

“30 – 10 = 20”

NEW EQUATION: 5s = 20

• THIRD: DIVIDE both SIDES by 5

5s/5 = 20/5

CANCEL out: 5/5 because that gives you 1

KEEP: 20/5 because that helps us solve for our “s”

NEW EQUATION: 20/5 = s

SOLVE ABOVE and YOU HAVE YOUR “S”

20/5 = 4

Answer: s = 4 ☑️

Good luck on your assignment and enjoy your day!

~LoveYourselfFirst:)